The Geni Consistency Checker will report "Spouses have a large age difference" on any profile whose age differs from a partner/spouse by 35 years or more. The severity of the inconsistency depends on the age difference:
Warning - for profiles whose age differs from their partner by less than 80 years
Error - for profiles whose age differs from their partner by 80 years or more
Auto-fix: There is no auto-fix for this inconsistency. The profile birth date may be incorrect, the partner's birth date may be incorrect, or they might have never been married.